Often used at parties when the host is disliked somewhat, the top dweller is when someone, instead of using the toilet as normal, takes the lid off the cistern and shits in there. This results in shit particles flooding the toilet every time it is flushed. It can last for weeks on end, depending on the quality of the shit

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.